Electrical signaling device



June '24, 1930.

` A.w. um. 1,765,466

ELECTRICAL SIGNALING DEVICE Filed Aug. 4, 1924 s sheets-sheet 2 6o 59 57 6 o Z 8 43 Eby 3 'sa n v7l :n 453 37 Z4 I .y l g? n 8 m w f, s 59 44 "X46 Z. .7 v ,*I-J M 70' -vlf gi 52' 5f 16 6 J 15', 5123.5. n 63 66 .24 f

38 a 1o i 64 w.: 4 46 msuLAT'lon 'ff' 6 June 24, 1930. A. w. UHL

ELECTRICAL SIGNALING DEVICE :s sheets-sheet 5 Filed Aug. 4. 1924 Patented. June 24, 1930V FFICE- ARTHUR W. UHT., OF BBOOnYN, NEW YORK, AssIGNOR To FORD INSTRUMENT OOMPANY, INC., or LONG ISLAND CITY, NEW YORK, A CORPORATION OF NEW YORK ELECTRICAL SIGNALING- DEVICE Application lecl August 4, 1924. Serial No. 729,967.

The present invention relatesv to electrically operated signaling devices, particularly adapted for use in. abnormally noisy places, where there is a requirement for the unmistakable recognition of transmitted messages or signals. One, of such places is upon a warshlp durlng a naval engagement, where the sounds of voices are merely commingled with the other noises contributing il@ to the din of battle, and where words become inarticulate.

It is a purpose of the present invention to provide a signal-emitting device, the signal sounds from which shall be so amplified above` any probable contiguous noise that tion, are eilectively accomplished by the construction employed.

@ther features of merit becoming apparent'hereinafter'are, of course, to be regarded asv coming withinthe scope of the present invention.

ln the drawings, Fig..1 is a vertical longitudinal section thru an improved signaling 'device embody-r ing my invention,'the section being taken on the linefl--l of Fig. 2;

Fig. 1,a ,is a diagrammatic -View showing thesignaling device in circuit;

Fig. 2 is a front elevation of the device; Fig. 3 is a view wherein the housing and some parts of the signaling device are shown 1n the horizontal section indicated by the line 3 3, of Fig. 1, other parts being shown in plan, with places broken away for `clear illustration; Y

L' Figs 4 is a transverse section, taken on the line 4 4 of Fig.. 1, and viewed in the direction of the arrow;.

Fig. 5 is another .section taken On line 5?-5 of Fig. 1, the arrow indicating the direction of vision;

Fig. 6 is a transversesection, lookingv in the same direction as in Fig. 5, but is taken on line ,6 6 of Fig. 1;

Fig. 7 is a similar view, but is taken on line 7-7 of Fig. .1, and shows Athesoundgenerating unit in front elevation,l and as being mounted within the casing;

' Fig. 8 is a rear'elevation of the soundgenerating unit removed from the casing;

' Fig. 9 is a fragmentary section taken on the line 9-9 of Fig. 6, disclosingthe connection between 'the electrical circuit-establishing elements associated, Y respectively,

with the casing and With the sound-unit; and

Fig. 10 is a detail view showing some of such elements viewed at right angles to 'I their positions in Fig; 9.

Referring now to the drawings, 1 represents the casing ofthe signalingV device, radiatingA from the rear vwall-of which are feet 2, perforated for the passage of bolts orscrews adaptedto be entered into a'suitable sup ort for the signaling device as a whole. asing 1 is generally cylindrical and extends forwardly of its supported end sucently to receive the sound-generating Y. unit proper and the interruptible circuitestablishing elements.

These elements are in part permanently] combinedwith the casing 1,v and in-part are so related to the removable sound-generating unit hereinafter more fully referred to. 0f the circuit-forming elements associated with the casing an insulating base 3 is attached by screws 4 to the rear wall of the casing 1,

as seen in Figs. 3 and 4. Screws 4 enter bosses 5 and are staggered to be above and below, vand at opposite ends of, a central rib frwhich extends internally-across the rear Wall of the casing 1. Y I i As best observedy in Figs. 6, 9, and 10, insulating base 3 is provided with a .plurality of vertically extending grooves, the two outermost of whichare designated as 7 while 8 indicates theA innerV grooves.l Each of the grooves 8 is expanded at a point approximatelymidway of-its length by a counterbore 9, which extends deeper than the groove and forms a pocket for` the reception of a spring terminal-socket 10. Lying inand lengthwise of grooves 8 are terminal plates 11, which project below the insulating'base 3, and are secured to the latter by screws 12. Other screws 13 are threaded into terminal plates 11, and serve to clamp thereto' the terminal plates 11 are connected by the' lexible conductors 22 to their respective fiexible terminal socket devices 1,0.- Each of the latter comprises a` plurality of spring clips bent as shown in Fig. 10 andgrouped side by side in mutual but automatically adjustable contact, as depicted in Fi 9. It will, of course, be comprehended, y inspectlon of Fig. 10, that the loops at the to of` the ksuccessively arranged clips of eac group forma passage into which one end of the associated fiexible conductor22 is inserted. In this assembly, the clip loops and the 1nserted portion of the iexible conductor 22 are bound together by a fusible metal. To protect the metal/lic parts associated with the insulating base 3, and thereby lso-- late them from each other and any contlguous metal, insulating 'lates 3a and 3* are secured to' the insulatlng base 3 and substantially' cover the opposite-'sides thereof.

A' pair' of plugs 23 project rearwardly.

from the sound-generating unit, and when the latter is` inserted in casing 1, the conicalv ends f the plugs make their way through' the central passages which are formed the clips of which the terminal socket devices are constructed.' The o 'posite end of each of the plugs 23 is of re uced diameter and is seated in an aperture in 'a metallic fterrninal guide 24, being retained therein by the shoulder incident to the diameter reduction and by riveting the reduced end at `the side of the guide that is opposite that borne against by the plug shoulder.-

Reference to Fig. 8 shows that the metallic 'terminal guides 24 are situated at opposite sides of an insulating terminal block 25, being positioned by dowel -pins 26 and held in place by screws 27. Terminal ides 24 are 'provided with parallel vertica y-extending flanges at their sides, between which lie the fiat portions of wire terminals 28 and 29, secured-,to vterminal guides 24 byscrews, and which by mutual co-operation with such Hanges prevent the terminals from turning. Conductors 30v and 31, which are provided with the terminals 28 and 29, respectively, constitute the conductors that place the coil 32 ofv an alternatingcurrent magnet 'in circuit.

Such magnet is of the solenoid type, being wound for a fre uency and electro-motive force best suite to the use to which the signaling device is'to be ppt. For example in the illustrated embodiment of,the` invention, the coil may be considered approriate for inclusion ina 110 volt alternating current circuit, having a 60 cycle frequency, thereby being suited to circuit conditions that arecommonly recognizcdas being standard.

The coil 32 is wound u on a metallic spool of non-magnetic materia comprising a central tube 33 and-end disks-34 and 35 interlocked therewith. Disk insulators 36 are positioned at the ends ofl coil 32 and between spool disk 35- and the rear circular wall 37 ofa coil housing that is also formed of non-magnetic metal. The coil housing further comprises a plurality of curved strips 38 annularly spaced from each other and an annulus 39 surrounding the outer end of the coil 32.

It will be seen from the drawings that ferentially intermitted cylinder having an "open end outlined byan annular iange and a substantially but not strictlyclosed cir-- cular rear wall. Into this ventilated hous. ing the coil 32 is inserted, the larger disk 34 of the coil slpool lying against the outer face of the coil ousing flange that is formed lin generaLthe coil housing forms a circumby the annulus 39, andscrewed thereto, as

' an intervening vibratory diaphragm 42. In

front of and lying agamst the outer of the ring insulators 41 is a retaining ring 43, screws 44 passing through it and ring yinsu- 'lators 41, diaphragm 42 and spacing ring 40, said screws being threaded into the flange-forming annulus 39.

A The" resulting structure constitutes a sound-generating unit, protectively encased in a skeletonized and ventilated housing, which unit is inserted in an outer casingl, and has projecting con act-making plugs which enter'and spread the terminal sockets 10 that are `maintained associated with ca s- 1 ing 1. When the sound-generating unit is in place, it is retained in the interior of 'casing l by screws '45 that have heads counter-- sunk in retaining ring 43, and which pass to and are screwed into internal anchoring lugs 46, projecting inward radially from the shell of the casing 1. (See Figs. 3, 6 and 7.)

Considering again the rear or inner end of the sound-generating unit, it will be noted by reference to Figs. 1 and 8 that the insulating terminal block `25 is secured to the rear wall 37 of the coil housing by screws 47. To guard against any danger of shortcircuiting between dowels 26, and the coil.

vand the rear wall 37 of the 4coil housing.

Threaded into this hole, so as to extend into the central tube 33, of the spool, is a headless screw 5() which functions as an anvil. The position of the anvil is-adjustable longitudinally of itself, and the anvil is locked in any suitable or desired position by a nut 51 and lock washer 52.

.Riveted to the center of diaphragm 42 is a core terminal 53 which is bifurcated'to receive the ends of the lamin 54 of the solenoid core, such laminae being riveted to core/terminal 53. The laminae 54 extend into the central tube 33 lfor the major portion of its length, and are clamped by rivets between a pair of core' guides 55 that, as may be seen from Figs..1 and 5, co-act with the laminas to form a reciprocatory plunger that isadapted to strike the anvil 50.

' At its open end, the casing 1 is provided with a flange 56, having an annular periodic v disposition of bosses 57 through whichl there are screw threaded holes. Closing the open end of casing 1 is a cover-58 having a flange 59 and bosses' 60 similar to bosses 57 and alined therewith. Cover bosses 604 are drilled and counterbored on the outside to form a shoulder. Entered from the rear side of cover 58, bushings 61 line the holes in bosses 60,- and .have flanges limiting the entry of the bushing into such holes. The iends of the bushing opposite these flanges are upset over the shoulders formed by the stepped holes in the bosses, whereby the bushings 61 are held against longitudinal displacement. The outer ends ot bushings 61 are, for a short distance, of less internal diameter aud are tapped to have screw threads at these places. Securing the cover 58 to the casing 1 are tap bolts 62, as shown in Fig. 1, which are -threaded at their ends only for a distance corresponding to their intended extent of entry into the casing bosses 57.. The remainder of the shanks'of the bolts are of suiliciently less diameter than. the lesser diameter of the internal `screw, threads in the bushings 61 to enable the bolts 62 to Aslide outwardly after their threads have been disengaged from those' of the case bosses 57.

The threaded ends of the bolts 62 may therefore, when the cover 58 is being taken off, enter bushings 61 until they encounter the threads of the latter, whereupon their withdrawal is arrested. Consequently, when the cover 58 is removed, the tap bolts remain attached to it-and are not likely to become lost. Tapdbolts 62, however, have the same size of threads as the bushings 61 and may be removed or replaced, when desired.

At its central portion, the cover 58 has a cavity 63, whichis turned to a larger dialneter to form an annular shoulder 64. Lying against shoulder 64 is a rubber, or other suitable gasket 65, between which and a retaining r1ng`66 is conined a secondary dia-v phragm 67 Cover 58 is provided in its rear face with anl annular groove for the reception and retention of another 'sealing gasket 68.

As clearly shown in Figs. 1, 2'and 3, the central portion of the front wall of the cover 58 is provided with a roup of s mmetrically arranged sound-emitting per orations 69, spaced in advance of whlch is a plate v70 mounted by screws upon bosses 71. The

plate 70 is intendedto be used as a name.

plate, and also serves to prevent thoughtless or'mischievous persons from inserting slender objects through the pertorations 69, which might result in injury to the diaphragm.

The operation' of the device is tas follows It being desired to soundv a signal at a remote point, where one of the' herein described signaling devices is located, switch 21, shown in Fig. 1a, is alternately closed and opened, in accordance with any code of siglnals adapted for use.

Upon the closure of switch 21 there will Y be, in consequence of the connection of con'- ductors 16 and 17 across vthe alternating current line 19-20,l as shown in Fig. la', an electrification of conductor 16 connected to line conductor 19, wire terminal 14, one screw 13, and the terminal plate 11 which it enters, the flexible conductor 22 connected with that plate and of the terminal socket device 10 to which the conductor extends.4 The electriication extends by the plug 23 that is inserted into the .referred to terminal socket 10 to the terminalguide 24 into which this plug 23 is riveted. Wire terminal 28 becomes alive, and Ithe current through conductor 30 reaches the solenoid coil 32, the conductor 3l making a pathl thereto and the terminal socket 10l enteredl by this plug are also in circuit. So,.too, is

the iiexible conductor'22v which extends from the last mentioned socket to other terminal plate 11. This, terminal plate, the

wire terminalconnected thereto and the conductor 17 completethe circuit to the other conductor 200i thel power line.

Withl he above outlined circuit l'osed thesolenoid core 32' is energized, and the reversas of the alternating i laminated core 54 to reciprocate rapidly 1n 10 response to the reversals of the current,

whereupon the primary diaphra m 42 is vi- .brated tol roduce a loud soun amplilied vby the stri ngof the core 54 on the` anvil 50, the soundhaving a duration equal to that 15 yof the closure of switch 21.

2511i p ragm 67Y in addition to -protecting the primary diaphragm 42, vibrates in response to the agitation of the latter and the sound passes freely 'through the apertures 69 ofthe cover 58. Obviously, the sealed-in soundgenerating apparatus is unaected b atmos pheric conditions, and its nicety o adjustment is in no way liable to disturbance.

When the sound generating-apparatus is 35 placed within the casing, the plugs 23, which with the parts associated therewith consti-v tute the one portion of a plug switch, easily enter the pressure-exerting terminal'sockets A ,10, which with'their associated parts con- 40 stitute the other portion of such switch. It v -becomes apparent, then, that the sound-producer is of a unitary character and may be readilyiinserted or removed at will..

VWhat'I claim is'z- 1. In va signaling device, a container having 'anopen end, a perforated cover'there'for,

a sound-producer mounted inthe container "removable as a unitjand havingna'contacting fdiaphragm, means retaining said diaphragm in said sound-producer, aO free diaphragm` current cause the said contacting dia) 3. In a signaling device, a casinghaving inwardly projecting attachment means, a cylindrical apertured coil housing having a covered end and ansopen end andan outwardly extending flange, a coil, a spool to support thev coil in" said coil housing, and having an extended ange, means to fasten the extended -flange to said spool to the fiaiige of the coil housing, a diaphragm, annular members to support the same, annular `washers insulating the diaphragm from said annular supporting members, means to connect said "annuli and diaphragm t'o the coil housing flange, and 'means to connect the wholeto said casing attachment means.

4. In a signaling device, a casing having separable parts, a sound-producer constituting a separate unit mounted in one of said parts, said unit including a contacting diaphragm, a free diaphragm, retaining means fixedly mounting said free diaphragm in another of said casinglparts in proximity to vragm, -a casing part mounting said free i'aphragm having apertures opposite the'latter, and a plate maintained spaced from but in protective relation to said apertures.

I In testimony whereof I ax my signature.

^ ARTHUR W'. UHL.

constituting a lportion 'of the closure, .re-

taining means to hold said free diaphragm iixedly. in said coverand means adapted to connect Asaid sound-producer 'with an ex-` 5'5 ternal circuit. l

2; In .a signaling device, casing having inwardly projecting attachmentmeans, an apertured coil housing havin a'anged end,

i a coil fxedlyssupportedin said' coil heus?,

Y a diaphragm,\a nnulai members to hold Said Ranged end, a cor'e condiaphragm on nected 'to the diaphragm and slidably j mounted insaid coil, and means to connect the annular members and the flange ofl said coil housing to the casing attachment means. 

